664423357216 has 48 divisors (see below), whose sum is σ = 1310427828864. Its totient is φ = 331616726784.

The previous prime is 664423357211. The next prime is 664423357223. The reversal of 664423357216 is 612753324466.

It is a super-2 number, since 2×664423357216² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664423357216.

It is not an unprimeable number, because it can be changed into a prime (664423357211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64987881 + ... + 64998103.

It is an arithmetic number, because the mean of its divisors is an integer number (27300579768).

Almost surely, 2^664423357216 is an apocalyptic number.

It is an amenable number.

664423357216 is a deficient number, since it is larger than the sum of its proper divisors (646004471648).

664423357216 is a wasteful number, since it uses less digits than its factorization.

664423357216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13673 (or 13665 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 49.

The spelling of 664423357216 in words is "six hundred sixty-four billion, four hundred twenty-three million, three hundred fifty-seven thousand, two hundred sixteen".